JPH0740936Y2 - Heat storage type electric heater - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial application field) The present invention stores heat in a heat storage body by using low-cost electricity such as late-night power, and heats the heat storage body during heating during the daytime. The present invention relates to a heat storage type electric heater that radiates heat and heats it.

(Prior Art) Conventionally, a heater of this type has a structure in which a heater is provided with an air outlet in an upper part and an air inlet in a lower part as shown in Japanese Patent Publication No. 57-55982. A heat storage body surrounded by a heat insulating material is arranged, and an air flow passage communicating with the air outlet and the air suction port is formed at approximately the center of the heat storage body, and a damper and a blower are provided in this air flow passage to provide heat storage inside the heat storage body. The installed heating element is heated by using midnight power to store the heat in the heat storage body, the damper is opened in the daytime and the fan is rotated to radiate the heat in the heat storage body by convection through the air flow passage to heat it. It is configured.

(Problems to be solved by the invention) Since such a heater heats a heating element by storing electric power at a low price such as midnight power to store heat, power supply time is limited. Therefore, during the power supply stop time, the limited thermal energy stored in the heat storage body is radiated to heat the heat storage body. Therefore, if the blower is rotated at high speed during this time zone, the amount of heat released from the heat storage body is large and The temperature drops faster,
In the latter half of the power supply stop time, there was a problem that most of the stored heat energy was consumed and the heating capacity deteriorated, which impaired comfort.

Therefore, an object of the present invention is to provide a heat storage type electric heater that has a heating capacity even in the latter half of the power supply stoppage period and can keep warm and comfortable throughout.

[Configuration of the Invention] (Means for Solving the Problems) The present invention has a heat storage type electric heater having a heat storage body and a heating element provided in the heat storage body to radiate the heat in the heat storage body for heating. In, a blower capable of blowing air to an air flow passage provided in the heat storage body and adjusting the number of revolutions, and a heating switch for rotating the blower at a high speed when the heat storage power source for supplying power to the heat generating body is turned on. And a power supply stop detection means for detecting a power supply stop of the heat storage power supply,
It is provided with timer means which operates by this power supply stop and rotates the blower at a low speed for an initial predetermined time in the power supply stop time period.

(Function) Heat energy is stored in the heat storage body by power supply to the heating element, and if the heating switch is turned on while power is being supplied to this heat storage power source, the blower rotates at high speed to heat the room while storing heat in the heat storage element. Is done. Further, when the power supply is stopped, the blower rotates at a low speed due to the operation of the timer means, but since the room is heated while the heat is being stored, the room temperature rarely drops significantly. After that, when a predetermined time elapses, the blower can rotate at a high speed, and the low speed rotation suppresses heat dissipation, and the remaining thermal energy has a heating effect even in the latter half of the power supply stop time period.

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings. In FIG. 1 and FIG. 2, reference numeral 1 is a heater main body made of a heat-resistant material such as a steel plate, and an air suction port 3 for sucking indoor air into an air suction chamber 2 is formed in the lower front portion thereof. At the same time, an air blow-out port 6 for blowing warmed air from an air blow-out chamber 5 provided above the air suction chamber 2 with a partition plate 4 is formed above the air suction port 3. . Reference numeral 7 denotes a heat storage body arranged inside the heater main body 1, and a heat generating body 8 is arranged inside. Reference numeral 9 is a heat insulating material such as glass wool, rock wool, microtherm, silica board or the like provided on the inner wall of the heater main body 1 so as to surround the heat storage body 7. Reference numeral 10 denotes an air flow passage formed between the heat storage body 7 and the heat insulating material 9 so as to communicate with the air suction chamber 2 and the air blowing chamber 5. Reference numeral 11 denotes a blower provided in the air suction chamber 2, and the rotation thereof causes the air sucked from the air suction port 3 to be blown out from the air outlet 6 via the air flow passage 10. It should be noted that a part of the air sucked by the blower 11 is sent as it is to the air blowing chamber 5 without passing through the air flow passage 10, where it is mixed with the hot air that has passed through the air flow passage 10 and then from the air blowout port 6. It suppresses the blowing of hot air.

In FIG. 2, reference numeral 12 is a heat storage power source such as midnight power, which is inexpensive, and the heating element 8 is connected via a heat storage switch 13 and a heat storage thermoswitch 14 provided in the heat storage body 7. Reference numeral 15 is a power supply stop detection relay connected to the heat storage power supply 12, and has a normally closed contact 15A which is opened by excitation by the power supply of the heat storage power supply 12 and is closed while the power supply is stopped. Reference numeral 16 denotes a general commercial power source that supplies a voltage regardless of whether the heat storage power source 12 is powered or not.
11 is connected via a heating switch 17. The blower 11 can adjust the number of rotations and has a tap L for low speed rotation and a tap H for high speed rotation. Reference numeral 18 denotes a switching relay for switching between these taps L and H, which is connected to the commercial power source 16 via the normally closed contact 15A of the power supply stop detection relay 15, and the switching contact 18A is constantly in contact with the tap H for high speed rotation, When the switching relay 18 is excited, the switching contact 18A switches to the tap L for low speed rotation. The heating switch 17 causes the blower 11 to rotate at high speed when the heating switch 17 is turned on while the heat storage power source 12 is being supplied. Reference numeral 19 is a timer device, which is connected to the commercial power source 16 via the normally closed contact 15A of the power supply stop detection relay 15 and is connected in series to the switching relay 18 in a normally open switch 19
It has A, operates by energization, starts time measurement, closes the normally open switch 19A, and after a predetermined time elapses
Is released.

The operation of the present invention configured as described above will be described in detail below.
First, when the power supply time of the midnight power is reached and the heat storage switch 13 is turned on, the heat generating body 8 is energized to heat the heat storing body 7 and heat energy is stored. In this case, the heat storage thermoswitch 14
Repeats on / off operations to automatically keep the temperature of the heat storage body 7 constant to prevent overheating. On the other hand, the power supply stop detection relay 15 is excited by the power supply at midnight, and the normally closed contact 15A
Is opened, the switching relay 18 and the timer device 19 are not energized. When the heating switch 17 is turned on in this state,
Since the blower 11 is energized and the switching contact 18A of the switching relay 18 is in contact with the tap H for high-speed rotation, the blower 11 rotates at high speed, and the room air sucked from the air suction port 3 passes through the air flow passage 10. In the meantime, heat is taken from the heat storage body 7 to become warm air, which is blown out from the air outlet 6 to heat the room. In this case, since the heat storage power source 12 is fed, heating is performed while storing heat.

On the other hand, when the power supply time of the midnight power is finished and the power supply of the heat storage power supply 12 is stopped, the heating element 8 is cut off, the power supply stop detection relay 15 is cut off, and the stop of energization is detected.
The normally-closed contact 15A of the power supply stop detection relay 15 is closed, whereby the timer device 19 is energized to operate. Timer device
When 19 operates, first, the normally open switch 19A is closed and the measurement of a predetermined time is started. This normally open switch 19A
The switching relay 18 is excited by closing the switch to switch the switching contact 18A to the tap L for low speed rotation. This allows the blower 11
Is forcibly switched to low speed rotation for a predetermined time after power supply is stopped,
Heating is performed with a small amount of air. Normally, while the midnight power is being supplied, sufficient heat energy is stored in the heat storage body 7. Therefore, even if the blower 11 is rotated, or even if the blower 11 is not rotated, the high heat energy of the heat storage body 7 causes The room is kept relatively warm. In other words, the heating switch 17 may be turned on as needed while the heat storage power source 12 is being supplied, and if the room is kept relatively warm without rotating the blower 11, the heating switch 17 is not turned on. May be. Therefore, even when the blower 11 is rotated at a low speed during the initial period during the power supply stop time period, the room is relatively warm, so that the blower 11 can be rotated at a low speed to reduce the air volume, and therefore the heat storage body 7 releases heat. A small amount of heat energy can be left in the latter half of the power supply stoppage period. Then, when a predetermined time has elapsed, the timer device 19 counts up and the normally open switch 19
Since A is open, the switching relay 18 is cut off and the switching contact 1
8A is switched to the high-speed rotation tap H again, the blower 11 rotates at high speed, the air volume increases, and the thermal energy remaining in the heat storage body 7 is sufficient to keep the heating capacity uniform until the latter half of the power supply stop time period. Can be heated to.

In this way, immediately after the power supply is stopped, the room is sufficiently warmed during the power supply time until then, so even if the speed of the blower 11 is slowed down and the heating capacity is lowered, the room temperature will be large. In order to prevent the room temperature from decreasing, the heat dissipation of the heat storage body 7 is suppressed and the temperature of the room is drastically reduced. By radiating the heat storage energy that was sufficiently left in the heat storage body 7 until then, the room temperature can be kept warm and comfort can be improved even in the latter half of the power supply stop time period.

Although one embodiment of the present invention has been described in detail above, it can be appropriately modified within the scope of the present invention. For example, low-cost electricity includes late-night electricity and snowmelt electricity in Hokkaido, which can also be used. In addition, a timer device detects when power supply is stopped.
A means other than a relay can be used as a means for operating the device 19 and the like.

[Effects of the Invention] As described in detail above, according to the present invention, in a heat storage type electric heater having a heat storage body and a heat generating body provided in the heat storage body for radiating the heat in the heat storage body for heating. A blower capable of adjusting the number of revolutions while blowing air into an air flow passage provided in the heat storage body; and a heating switch that rotates the blower at high speed when the heat storage power supply for supplying power to the heating element is turned on. The power supply stop time detecting means for detecting power supply stoppage of the heat storage power supply and the timer means for operating the blower at a low speed to rotate the blower at a low speed for the initial predetermined time in the power supply stoppage time period by the power supply stoppage. It is possible to provide a heat storage type electric heater that has a heating capacity even in the latter half of the obi and can keep warm and comfortable throughout.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is an electric circuit diagram. 7: Heat storage body 8: Heating element 10: Air flow passage 11: Blower 12: Heat storage power source 15: Power supply stop detection relay (power supply stop detection means) 17: Heating switch 19: Timer device ( Timer means)

Claims (1)

[Scope of utility model registration request] 1. A heat storage type electric heater having a heat storage body and a heating element provided in the heat storage body for radiating heat in the heat storage body to heat the heat storage body, the air flow passage being provided in the heat storage body. A blower that blows air and can adjust the number of revolutions, a heating switch that rotates the blower at a high speed when it is turned on while the heat storage power supply that supplies power to the heating element, and a power supply that detects stop of power supply to the heat storage power supply. Stop detection means,
A heat storage type electric heater comprising: a timer unit that operates when the power supply is stopped and that rotates the blower at a low speed for a predetermined initial time period during the power supply stop time period.